PopupWindow在android7.0和7.1.1和8.0系统显示位置异常

void showAsDropDown (View anchor)

Display the content view in a popup window anchored to the bottom-left corner of the anchor view. If there is not enough room on screen to show the popup in its entirety, this method tries to find a parent scroll view to scroll. If no parent scroll view can be scrolled, the bottom-left corner of the popup is pinned at the top left corner of the anchor view.

 

解决方式:

重写方法:

/**
 * 24 7.0 25 7.1.1 26 8.0
 * @param anchor
 */
@Override
public void showAsDropDown(View anchor) {
    if (Build.VERSION.SDK_INT == Build.VERSION_CODES.N || Build.VERSION.SDK_INT == Build.VERSION_CODES.N_MR1 || Build.VERSION.SDK_INT == Build.VERSION_CODES.O) {
        Rect rect = new Rect();
        anchor.getGlobalVisibleRect(rect);
        int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;
        setHeight(h);
    }
    super.showAsDropDown(anchor);
}

　　原因其实就是setContentView(view);设置的view是match_parent的 ,这里去除了anchor的之上的高度